Rockwell Automation 22C PowerFlex 400 AC Drive FRN 1.xx - 7.xx - Manual (Page 178)

D-2 Application Notes
PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22C-UM001I-EN-P
PID Control Loop
The PowerFlex 400 has a built-in PID (proportional, integral,
differential) control loop. The PID loop is used to maintain a process
feedback (such as pressure, flow or tension) at a desired set point. The
PID loop works by subtracting the PID feedback from a reference and
generating an error value. The PID loop reacts to the error, based on the
PID Gains, and outputs a frequency to try to reduce the error value to 0.
To enable the PID loop, parameter
A152 [PID Ref Sel] must be set to an
option other than 0 “PID Disabled”.
Exclusive Control and Trim Control are two basic configurations where
the PID loop may be used.
PID Setup